LiftMaster SL595 SL595 Manual - Page 20

ACCESSORY WIRING (CONTINUED) Terminals 7 & 5 (Com) - Hard Open Override Control Input These terminals are intended for use only with the open control of a 3-button station that is installed within line of sight of the gate. A momentary activation of this input will cause the gate to open. Activation of this input for longer than three seconds will enable the control to be used as a constant pressure override device. This will allow the user, in emergencies, to override a failed accessory such as a loop detector or photo-eye. Terminals 4 & 5 (Com) - Close Override Control Input Open Override Control Input 3 4 5 6 7 8 9 N.O. Com 3 4 5 788 Close Override Control Input 1 234 567 These terminals are intended for use only with the close control of a 3-button station that is installed within line of sight of the 12 3 456 gate. A momentary activation of this input will cause the gate to close. Activation of this input for longer than three seconds will N.O. Com enable the control to be used as a constant pressure override device. This will allow the user, in emergencies, to override a failed accessory such as a loop detector or photo-eye. 1 234 56 789 Terminals 8 & 5 (Com) - Interrupt (Safety) Loop Input These terminals are intended for use with a loop detector. This input functions to reverse a closing gate to the open limit. Latching this input will reset the Timer-to-Close. 1 234 56 Terminals 2 & 5 (Com) - Shadow Loop Input These terminals are intended for use with a loop detector and is primarily used on swing gate operators. This input protects cars by preventing the gate from moving off of the open or close limit when the shadow loop input is active. The control board senses commands using +24 Vdc from terminal #3. Commands are seen when +24 Vdc is applied to the controller's input terminals. NOTE: The control board has built in surge suppression circuitry however please take precautions when adding any additional surge protection. Interrupt (Safety) Loop Input Shadow Loop Input MASTER/SECOND SYSTEMS Dual Gate Communications The control board is capable of running the operator in a master or second mode depending on (S4) switch setting. Before initiating any command the master unit queries for the presence of a "second unit" for a time period of one second. If the master gets no response the operator will operate in a stand alone mode. NOTE: For single unit applications, a jumper must be placed between 11 and 12 of the field wiring terminal block. In this mode no further communications will take place during travel. If the master detects the presence of a second unit the master will continue to query the second unit during travel. The second unit will send a response to the master for every query. The second operator will stop if there is a period of one second or more of no communications. When two operators are connected in dual gate configuration accessories may be connected to either the master or second. NOTE: Do not run Master/Second communication wiring in the same conduit as the power and control wiring. The Second unit will require a normally close stop circuit for proper system operation. After Master/Second wiring has been completed and the S4 switch programmed, both units must have their power cycled to initiate proper Master/Second communication. The motor learn function must be completed in stand alone mode prior to Master/Second wiring. Master or Standalone Gate Setting Master Unit ON S4 Second Gate Setting Master Unit ON S4 Second Unit Second Unit Interrupt Safety Loop Terminal Shielded Terminal Block cable Block 12 11 (twisted pair) 11 12 minimum 18 gauge Conduit Earth Ground Rod (One side only) STREET Master Second SInatfeertryupLtoopCOOMRPLEX PARKING LOT 20